1. Locally bounded linear topological spaces,;T. Aoki;Proc. Japan Acad. Tokyo,1942
2. Whitney's extension problem for multivariate $C^{1,\omega}$-functions,;Y. Brudnyi;Trans. Amer. Math. Soc.,2001
3. Smoothness and smooth extensions (I): Generalization of MWK functions and gradually varied functions,;L. Chen;preprint
4. A digital-discrete method for smooth-continuous data reconstruction,;L. Chen;preprint
5. "Analyse Harmonique Non-Commutative sur Certains Espaces Homogenes,";R. R. Coifman;Lecture Notes in Mathematics,1971